no, this happened to my fat psp, i dont remember how i fixed it but ill try and remember here:
1.) make a timemachine with your MS & batt make it a 1.50 battery
2.) now get a 3.90 OFW updater and put it on the same MS
3.) load up 1.50 TM(timemachine) wait for it to boot, do what you have to do there
4.) now go to game> then load the 3.90 updater
5.) if all went well you will be on 3.90 OFW, now run the pandoras again, make sure your using DCV7!! it will install 4.01m33-2

NOTE!!:
the 3.90 OFW updater, im not sure you can use whatever updater you like just dont go below 3.60? i think its 3.60....and follow the guide as you see it dont change ANYTHING!! post back to update us...