Number sequence for custom table in ax 2012

Hi,

I have a custom utility which uses a custom table in AX 2012 AOT, I want to have an identity field for my table and someone tell me I can use number sequences for this, and can map a number sequence to my table so it can get a new unique id at the time of row insert, when I try to generate number sequence it asks me AREA and module information, since i want this for my custom table and utility which is working outside the dynamics ax 2012 using .net business connector, I am unable to figure out what to input the wizard.

Please help.

Rgds,

Ali Sanan.