Quality of graphic at top of widget very poor

Hi,

The issue is that I'm trying to put my logo at the top of my widget but the quality is very poor. After I upload it from my computer, I am forced to resize it and it's difficult to get anything that looks good. I'd prefer to not resize/alter its dimensions at all after I've created it here in Photoshop.

Ideally, I could upload the graphic exactly as I want it, and no resizing/alteration of my graphic would happen, it would just appear on the widget exactly as I submitted it. (As you can see, the original graphic that I'm sending is flawless.)

Please let me know how I can improve the quality of the graphic once it appears on the widget.

thanks,
Eric