Make sure you are using the correct version of p2kseem, which is called "P2KSeem for V710" on Mark's pages.
For full information, go to Mark V's pages here: mark.cdmaforums.com (and click on the Seem Edit link!)

Make sure you are using the seem for your particular phone model!

P2K Seem Settings
Record length field: use the number denoted in the filename after the seem number (they are all 1 except the 296a seem, which is 5).

Bytes (h) field: use the number of hex bytes denoted in the file name.

Seem field: use the seem number denoted in the file name.