ssh tunneling

Hi,

I have tried the following:
on PC1 (win xp) I have created ssh connection with port forwarding (local 8888 to remote 8888) to server1.
>From server1 I have created another ssh connection with port
forwarding to server2(local 8888 to remote 1521).

When I try to connect to oracle instance on server2 from PC1, I got an error: Oracle Error :: TNS-12547
TNS:lost contact

Does anyone have some experience with this kind of tunneling?

Thanks,

Goran

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