[HELP] Visual Basic dll protection

I need some help please. I have a visual basic app that I can get to work within Olly, but when I go to make the permanent changes to the DLL file the app crashes.

Upon further investigation it is during the LoadLibraryW function. If I modify the dll file, the LoadLibraryW function will return file error.

If I use the original dll file, then LoadLibraryW loads the dll without error.

It appears to be some kind of checksum protection. Any thoughts how I might overcome this?

Thanks,

-Malt