I cannot give you a full answer, but to me it looks that you manipulate the form's action:

$dest =~ s/<form name="loginForm"/<form action='..\/Login1.action' nam
+e="loginForm"/ig;
[download]

which is later not recognized by the server:

Error POSTing http://wwwl.way2sms.com/Login1.action: Not Found at SMS.
+pl line 48
[download]

Is such cases I would advise to study the webpages' source code again.