Unable to start j2ee engine

I was instructed to change out the JDK and the JDK that I switch out to wasn't compatible with our system. When I switch back to the first JDK the j2ee engine won't start. Here is the log from dev_disp:

***LOG Q0I=> NiIRead: recv (10054: WSAECONNRESET: Connection reset by peer) [nixxi.cpp 4424]

• ERROR => NiIRead: SiRecv failed for hdl 5 / sock 36

(SI_ECONN_BROKEN/10054; I4; ST; 127.0.0.1:3494) [nixxi.cpp ; 4424]

DpJ2eeMsgProcess: j2ee state = CONNECTED (NIECONN_BROKEN)

DpIJ2eeShutdown: send SIGINT to SAP J2EE startup framework (pid=2396)

• ERROR => DpProcKill: kill failed [dpntdisp.c ; 371]

DpIJ2eeShutdown: j2ee state = SHUTDOWN

Any help would be greatly appreciated