GL account mass maintanence problem

Dear Gurus,

I need to change 150 GL accounts simultaniuosly and apply the tick on relevant to cash flow for all these accounts. I have gone to code OB_GLACC12, but there is no field of relevant to cash flow on the screen. I chose the select fields option and selected the relevant to cash flow field from the options. but the field is not appearing on the main screen.

can anyone give me a solution on this.

Nikhil