A few questions and suggestions...

1) When you dial *228 do you get a cricket message?
2) Does the ESN match under the battery with what is displayed in the ## menu?
3) What area are you in?

Suggestions
There are many causes for the MEID to fail when cricket enters it, the biggest cause is user error. Have a dealer enter it.
Scrap using QPST and use CDMA WS 2.7 will do if you need to reflash it you can write the data parameters by editing the NV files directly.