Oracle portal page error.

Hi!
When I click on a tab in Oracle Portal page i got the following error:
- ORA-01403: no data found ORA-20101: ORA-06512: at "DEV_PORTAL.WWPOB_API_PAGE", line 5247 ORA-01403: no data found ORA-01403: no data found.
In WLS_PORTAL.log fileL do not appear any error message but in the WLS_PORTAL.out i get:
- ERROR: Repository Gateway error: Database Error: ORA=20001 ORA-20001: Unable to obtain session information from the cookie.
ORA-06512: at "DEV_PORTAL.WPG_SESSION", line 174
ORA-06512: at line 32
I Have installed the 11g version in a Windows Server 2008.
Anybody knows how can i solve it?
Regards.

Dennis
A general shared_pool_size Q&A is part of the Troubleshooting Guide on OTN: http://technet.oracle.com/products/iportal/htdocs/portal_troubleshooting.htm
The Configuration Assistant determines the shared pool size from the view v$parameter,
which lists information about the initialization parameters (populated from init.ora file). If the shared_pool_size value is more than 15728640 (for a default installation), you pass the minimal requirements set by the Portal Installer. Make sure you actually write out all the digits (i.e. 1000000000) and don't use abbreviations (1000M). Currently, the Configuration Assistant does a numeric check against the values that are set and cannot resolve the abbreviate syntax.
Also try running the sql [select value from v$parameter where name like 'shared_pool_size';] to check if the changes you are making in the init.ora is really getting populated in the v$parameter view. As long as you restart the database once you make the change in init.ora, it should take effect.
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