Thanks for your response and your collection of links/tips. This ended up working:

my @params = ( SOAP::Data->name( 'application' => 'CLAWS' ),
        SOAP::Data->name( 'xmlReq' => '<?xml version="1.0"?><transacti
+on><apiname size="40">LockAcct</apiname><comcorp>7801</comcorp><house
+>158301</house><opr size="5">KPE</opr></transaction>' ));

my $som = $soap->call( sendxml => @params);
[download]

Thanks again!
Scott...