Simple Invoices - Forum

Hello, Its been a while since I actually signed in but I have been using SI for my business venture. I do have a question on the logo in the pdf. I have a transparent logo and shows up fine except the background on the pdf is black. Therefore, It doesnt show my logo very well. Where do I fix that? Im using the latest SI as I had to do a total system reload and restore from backup (went quite well!). But I need to have the background on the pdf show as white like the background of the pdf??