Auction Script Error

Hi, I am trying to find someone to fix a auction script that keeps getting the error "The item number may not contain any non-numeric characters" It works great on old hosting server, but we have upgraded our servers and it comes with this error We own the hosting company and we will change or add any updates/upgrades to the server if needed. This seems to be a fairly common error with these scripts and I'm sure someone knows how to fix this. Please let me know if you do and provide an estimate for the work. Thanks!