[Forums] Problem Uploading Files

I have a problem when I want to Upload a File in my application. I followed this guide:

http://www.outsystems.com/forums/discussion/6967/how-to-have-a-webblock-to-upload-a-file/

But I keep having a message that says "String or binary data would be truncated.
The statement has been terminated." when I want to make the upload in the application.

Regards
Yannick Rios