Nokia N73 ME phone memory shows full but not full

Question

HI. Ive been getting this problem since a while but ive always succeeded to fix it by deleting various things(like messages and clearing the log). But its not working now. My phone is showing 0 kb free memory and 44 mb used memory. The prob is everything is on my mem card. I even tried to removed my mem card. Nothing is working. I cannot receive messages and missed call wont be showed on the screen. there is absolutely nothing that ive saved on my phone. all messages have been erased, theres no application that ive added, logs have been cleared...plzzzz help me!!! :'(