Unable to connect other client once Oracle10g DB installed in my desktop

Hi,
I have Oracle Client in my desktop and I am able to connect Oracle servers which connected through LAN.
I have installed Oracle10g Express Edition Database in my desktop for the Backup purpose.
I am struggle to connect other Oracle Database which connected in my Local Area Network once I have installed the Oracle Database in my Desktop.
I can able to connect installed Oracle10g Express Edition DB, but not other Oracle DB Server.
Kindly guide / help me to use both Oracle DB Server which Installed in my PC and Others.
Thanks in advance.
Orahar.

This is because most recent installed software becomes sets to default ORACLE_HOME,PATH and ORACLE_SID settings .
Whenever you want to connect through client software set oracle_home,path and oracle_sid .
If you want to bypass setting these things
go to MY COMPUTER>PROPERTIES >ADVANCED > ENVIRONMENT PROPERTIES>ADD
tehn add value for ORACLE_HOME,PATH and ORACLE_SID with old settings.
you should be able to make connections.
OR
you can add TNSNAMES.ora entries of XE database with old tnsnames.ora details. you should be able to connect.
Regards,
Anil Malkai

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