Well, first you should open a browser and try to load http://localhost:8080/service.svc?wsdl. If that doesn't work, you found your problem.
If that works, then maybe add some print statements to you code so you see what's giving the error. For example:
my $lite = SOAP::Lite -> service('http://localhost:8080/service.svc?ws
print "This is after creating \$lite\n";
my $arg1 ="SRC";
my $arg2 = "ARG";
my @arg3 = ('test1','test2','test3');
my @res = $lite->Func($arg1,$arg2,@arg3);
print "This is after running Func\n";
My guess would be that either the URL is no good, or Func is causing the problem. What is Func? Care to share some code so we know what the heck you're doing?