I got the impression that someone was using the wrong type of ram too, I went to IWILLS homepage and got this for you just in case.........
What Ram is compatible? SDRAM. Get very good ram, rated at PC133 Cas 2 or PC150 Cas 2--because the KK266 deserves the best.
3 x 168-pin DIMM Sockets Support up to 1.5 GB of PC133 Memory
Supports PC133/PC100 SDRAM and VCM Memory Types
Supports 64/128/256/512 MB SDRAM Modules
Supports 3.3V Unbuffered/Registered DIMM
Threaded Mode