database connection - Cannot connect to Oracle server -

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i have oracle server can accessed locally (i.e. computer oracle installed) using sqlplus , default port 1521.

from client computer, can access shared folders on server, cannot access oracle database using sqlplus or sql developer. "io error: network adapter not establish connection."

i sure there problems on oracle server, because can access other similar oracle servers same client.

there no problem network connection well.

tnsnames.ora files ok. 3 oracle services started (same other similar oracle servers): listener, dbconsole , service.

all windows systems.

how can figure out?

p.s.: no firewall on server; tnsping ok.

i think listener on server or tnsnames.ora on client problem. when connecting server sql*net protocol bypassed. on server run : 

c:\lsnrctl status

and check if database serviced listener , check if parameters same in tnsnames.ora, use qualified host names.

edit check

c:\lsnrctl services


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