Perl script calling a java program

Hello,
I have the following perl script that executes a java program called TestSe. It passes its QUERY_STRING to the java program after printing it.
#!/usr/bin/perl
print "Content-type: text/html\n\n";
$in = $ENV{'QUERY_STRING'};
print $in;
exec 'java TestSe '.$in;
This script in placed in a cgi-bin directory on a server.
This script works when i run it manually and hardcode a string value in $in by doing
$in="Acheck";
It prints 'Acheck' on the screen and invokes the java program with Acheck as the parameter.
I tested it by typing
'perl try.cgi' on the shell after logging into the server.
However when I execute this script via. a browser then it does not exec the java program.
The QUERY_STRING is the papameter passed to this script by an html form in a browser that invokes it. The script can print the value of $in in the new browser window that it creates but it is not execing the java program.
Does anyone kow why?
Thanks

Perhaps java isn't in the PATH for the server

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