My nano 2gb only holds 185songs nd then says its full. wats wrong?

This all depends on the size and quality of the files you are putting on to the player. What formats are the songs in? Are they high quality songs (E.g. 320 Kbps?). The most important thing to look at is the size of the MP3 files or music files that you are putting onto the player. 2gb can hold a fair amount of songs, but for a better idea check here: http://www.beatsuite.com/page/96/
Also, ensure that you dont have any video files on the player, as these take up LARGE amounts of room.