Nero burning question

I've followed the steps on a previous site to properly split an .avi divx file into 2 pieces. No problems there. But when I go to burn the files, they're under 700MB but I get an error stating " filename.avi: Not Enough Memory ". Now I've also tried burning .avi divx files that are around 325MB in size and get the same error. Can someone possibly tell me what exactly the term 'memory' in this case is referrin to and what I can do to fix it? Thanks in advance! = )

Btw.. im using Nero v.5.5.5.1