Channel_setup_fwd_listener: cannot listen to port: 1158

I want to access the Enterprise manager through.
http://<IP Address>:1158/em/
Because of firewall issue i used ssh to create the tunnel.
But i gives an error.
I do not undestand it very clearly and workaround for that.
oracle@srv603484:~> ssh -fNL 1158:<IP Address>:1158 oracle@<IP Address>
Password:
bind: Address already in use
channel_setup_fwd_listener: cannot listen to port: 1158
Could not request local forwarding.
Please help.
Thanks,

It seems this is a ssh tunnel issue. Try this:
ssh -f user@<IP Address> -L 1158:<IP Address>:1158 -N

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