Incompatible Windows software?

Hi all -

I'm a newcomer to Parallels (Desktop 6), and had, perhaps wrongly, imagined all software developed for Windows should run correctly.

Today I attempted to install a piece of software and hit an error message (failed to register a dll file). I contacted support of this vendor's software, and was informed that it was not developed to work with Parallels... Must a developer make something 'work with Parallels'? Seems odd to me, and has fudged up my plans too.

Any insight will be greatly appreciated.

Cheers!

 

Update: Did a little research into how the software operates, installed SQL Express, and it now works...