for those who get it wrong, it's working now for me, if u find any bugs and errors, plz do update me.

#!/usr/bin/perl

use File::Find;
use threads qw/async/;

my $source = "C:/DManager";
$destination = "E:/Job_server/Helix_destination";
my @t;

########
my $workers = 1;  #number of workers 
my $sequence = 0;    
my $threads = 0;    #number of threads
my $done = 0;        
my $resources = 5;  # set how mant jobs u want to run
my $count =0;
my @fin_threads;
########

find(\&copydir, $source);

###  find ####
sub copydir {

    my ($parent, $child, $filename, $mpeg);
#    print "Now starting \n";
        if (($_ ne ".") and ($_ ne " ")) 
            {                
                $mpeg =  $_ if (($_ =~ /.*\..*/) && ($_ !~ /.*\.db/));
                    
                if ($_ !~ m/\.*\.\w+/) 
                    {                    
                        $parent = "$File::Find::dir"; 
                        $child = "$File::Find::name";

                        print "Folder name : $_\n";    
                        #print "Parent Folder : ". $parent."\n";
                        print "Child Folder : ". $child ."\n";
                    }
                
            }    
            if ($mpeg) {
                print "filename : $mpeg\n";
                my $rm;
                
                #my ($rm) = $mpeg =~ /((.*)\.)/;
                #$rm =~ s/\.//;
                #$rm .= ".rm";
                my $path = $File::Find::name;
                $path =~ s/\//\\/g;
                $rm = $path;
                $rm =~s/\..*/\.rm/g;    
                
                
                &CheckQ();
                StartQ($mpeg, $rm, $path);
            }
}

sub StartQ
{
        #print "Now in StartQ \n";
        my ($input, $output, $path) = @_;
        
        $threads++;

        print "pushing to the Thread ". $threads ."\n";
        eval {
                #push @t, async {
                 push @t, async {
                
                            Dummy_process();
                        };
        };

        if (!$@) {
            $fin_threads[$workers] = 0;
            $workers++;
            #sleep 2;
        }
        else
        {
            $threads--;
        }
    
    #print "running process \n";
}

sub CheckQ
{
    print "Workers working : ". $workers. "\n";
    if ($workers >= 5) {
        print "Wiating for one of the worker to finish the job\n";
        print "Checking threads for safe exit \n";
        SafeExit();
            for (@t) {
                #$_->done() or sub {$workers--; return};
                #if (!$@) {
                    #if (!$_->join) {
                if ($fin_threads[$workers] != 1) {
                    print "Work in process checking other workers : Wo
+rkers : $workers\n";
                    print $@ ."\n";
                    if ( @t <6 ) {
                        $workers = @t;
                        return;
                    }
                }
                else
                {
                    $workers--;
                    print "Worker finished working : Workers : $worker
+s\n";
                    return;
                }
            }
    }
    else
    {
        return;
    }
}


sub SafeExit
{
    print "\n In Safe Exit\n";
    
    for (@t) {
        eval{
            #if($_->join) { 
             if ($fin_threads != 1) {
            print "A thread already joined in exit status\n";
            print "\n $count \n"; 
            print "\n $_\n";
            splice(@t, $count, 1);  
            sleep 5;
            $count++;
        }
        #else
        #    {
        #    next;
        #    }
        };
        if ($@) {
        
        }
        
    }
}
######################################################################
+########################
#for checking the Threads only.
sub Dummy_process
{    
    print "Thread: ". threads->self->tid ."Started with working ". $wo
+rkers. "\n";
    sleep 2;
    $fin_threads[$workers] =1;
}
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