There are a number of issues that can occur when ANY third party application attempts to connect to QuickBooks. The QuickBooks Error Description usually contains helpful information and sometimes they may be vague at best.

These errors usually occur when the third party application initially connects to QuickBooks and basically says; "Hi, my name is application X, and I'd like to work with this QuickBooks data file. Cover the basics first, double-checking the most simple things first.