I bought a 4G kit of Kingston memory for our Power Edge 1800 and when I went to install the new memory It didn't fit. I compared the modules and the slot does not match up.

Kingston 4G PC2-5300 CL5 ECC 240 pin FB-DIMM (P/N KVR667D2D8F5K2/4G

In all the reading of adding memory I have not seen any mechnical problems! Can someone tell me if I have the wrong memory?