Unable to upload .gba file to skydrive

Hi,

 I am unable to upload a .gba file to skydrive when i am able to upload a zip file containing the .gba file, yet unable to upload a folder containing the .gba file within it.

 All i get is this message "Sorry, there was a problem uploading this file. Please try again."

I have attempted to go through live chat, which for some reason just diverted me to xbox help twice where they gave me a useless page on how to upload files and then a link for the forums.

I hope that someone can help me as i am beginning to lose my patience with this windows phone, as it is completely useless at being back compatible with older OS systems hence transfering files through skydrive now being my only means of getting files on my phone.

Regards

Luke