what does this error mean (avrdude: stk500_getsync(): not in sync: resp=0x00)

Hi I am experiencing the ssme problem. Can anyone guide me how to solve the problem? My board is anrduino duemilanove.

It is very strange when I try to upload a sketch using IDE 0022 everything works as it should but when Iuse the latest IDE 1.0.5 I get the error as mentioned in this subject.

IDK more what to do.