Imei lost after flasing? I900

[Guest sjors86]

I flashed my Samsung Omnia (i900) a multiple times and i'm currently using OCK's rom.

I wanted to buy the slideit application, but I couldn't get my imei number with *#60#, it gives the error unknown application.

I removed my battery and used the imei number from the back and bought the application, though it says my phone has a wrong id.

I'm wondering if my phone actually still has an imei number and how can i fix my problem?