Cant connect to local oracle database unless connected to the web?

Hi,
If anyone can help me out, I have an instance of Oracle 11g running locally, which runs fine, but if i am not connected to the Internet the TNSNAMES connection fails, the TNSNAMES.ora is as follows, I think it must be the dynamically assigned IP address, so I replaced this with 127.0.0.1 but no joy, then it gives error ORA-12541: TNS:no Listener but I have also updated the Listener?
Any Ideas
TNSNAMES
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.2)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl.168.2.2)
LISTENER
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST =127.0.0.1)(PORT = 1521))
Thanks

also tried the PC name e.g.
TNSNAMES
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = CPA)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl.168.2.2)
LISTENER
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST =CPA)(PORT = 1521))
)

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918440 wrote:
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Cant connect to local oracle database unless connected to the web?

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