First off,
DON'T SHOUT. Using all capitals is considered shouting on the internet, and rude (using all lower case is considered childish). Use proper capitalization if you want to be taken seriously.
At a guess, you are retrieving the image data from a DB, and that's where the problem lies - or at least with the data itself.
Have a look here:
Why do I get a "Parameter is not valid." exception when I read an image from my database?[
^] - the code is in C#, but it's exactly the same process for VB.