forms in FP 2000 and FP 2002 use the same extension, and therefore your form should work.
My personal advice is to actively pursue a move to a new host as soon as is practically possible. You have been charged an excessively large amount for a one year standard hosting package, which would normally be around the £80/90 mark. A reasonable charge for installing and configuring FP extensions on a Windows server would be around £25.
The domain is tagged to FIBRANET, which is a Spanish network services provider, so the position is somewhat confusing. I suggest that you clarify the domain name registrant's true identity, and if it isn't your colleague, steps should be taken to transfer ownership to him as soon as possible. Then you can have the name tagged to a new host when appropriate.