NW2004s BI 7.0 upgrade error

Hi grus,

I upgraded Oracle from 9.2.0.5 to 1.0.2.0.2.Now I am upgrading BW from BW 3.1 to NW2004s BI 7.0. I took error in PREPARE "J2EE_CHK1" phase. The J2EE_CHK1 phase ended with "SEVERE ERROR, the j2ee engine was not deinstalled properly".

How can I resolve this problem?Please help me.It is very urgent for me.