Itr4 huf return filing query

Sir

I am filing a returnm for HUF, ITR4. in latest Java utility from income tax website.

I filled up General Sheet mentioning HUF & its PAN.

In verification I mentioned same PAN of HUF. But I get the error that PAN NO. 4th alphabet should be P.

my query is how can HUF PAN have 4th alphabet as P.

Then I filled upt Karta's Personal PAN in verification, the utility validated and X M L created, but at

the time of upload I got error that personal/verification PAN is Invalid.

What shall I do.

Please Help me fast.