help me my arduino is not reciving uploads

ok so im sending new sketches to my arduino and its saying it was successful but the arduino says otherwise... the up dates im applying are not taking effect ... i even tryed uploading the bare minimum sketch and it continues doing the original sketch

Sketch uses 6,566 bytes (20%) of program storage space. Maximum is 32,256 bytes.
Global variables use 335 bytes (16%) of dynamic memory, leaving 1,713 bytes for local variables. Maximum is 2,048 bytes.

Please supply the complete compiler text.