Neteller API upgrade from 4.0 to 4.1

We have Neteller on our system to accept payments. It is all run by a Perl file, which sends the relevant information to Neteller and receives a response. We now have to upgrade to 4.1 from 4.0. There is very little difference, but there is something small that is causing errors. We need someone to check and fix this. The winning bidder will need to know Perl to understand the file, because it is not a straight-forward POST form. The winning bidder should be able to fix this without going into our system, but if that is necessary a Non-Disclosure Agreement will need to be signed.