PM 8920 download space

I've been using 3gupload to put some of my files onto my PM 8920 phone until I get a data cable. I have no problem doing that. The problem came when I tried to download another file. The phone then tells me "The maximum download space (64 contents) has been reached. Delete one to free space". Huh? I have PLENTY of space left on my phone (3293 kb to be exact). There's NO WAY all I can download is 64 files! On my old Sanyo 8100, I could download until my phone completely ran out of space. I'm confused. What can I do to get more stuff on the phone? Will a data cable help shortcut this? PLEASE help!! :confused: