Exception getting while creating a login page

Hi,
I am trying to redesign my portal's login screen. For that i have downloaded <b>"com.sap.portal.runtime.logon.par.bak"</b> file created a new portal application named <b>com.test.login</b> and imported the par file from com.sap.portal.runtime.logon.par.bak.
I have exported the PAR file and deployed it to Portal. I checked <b>"<J2eeinstance>\j2ee\cluster\server0\apps\sap.com\irj\servlet_jsp\irj\root\WEB-INF\deployment\pcd"</b> folder after upload and the file is there in the server.
I have changed the <b>"authschemes.xml"</b> file accordingly. But when i restarted the cluster and called the login page, i got an exception like givel below,
Portal Runtime Error
<b>An exception occurred while processing a request for :
iView : N/A
Component Name : N/A</b>
When i checked the log file, I found the exception logged as <b>"Could not instantiate implementation class com.sapportals.portal.ume.component.logon.SAPMLogonCertComponent of Portal Component com.test.login.certlogon because: Could not find implementation class "</b>
<b><i>I didn't changed any files in the PAR file during developement. It is a copy of the original com.sap.portal.runtime.logon.par.bak file,</i></b>
Can you please point out what could be missing in between?
Best regards,
Sudheesh

Hi
   I got this error once. The problem is that while importing, the jar files don't get imported. Try including these two jars (umlogonbase.jar and
com.sap.portal.runtime.logon_api.jar) from
usr\sap\J2E\JC00\j2ee\cluster\server0\apps\sap.com\irj\servlet_jsp\irj\root\WEB-INF\portal\portalapps\com.sap.portal.runtime.logon\lib
and copy manually to the lib folder under PORTAL-INF in your project and then export your new par file.
Regards
Harini S
Message was edited by: Harini Subramanian

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    "Philippe Cote" <[email protected]> wrote in message
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    I also tried using the <cm:select...> tag in various fashions, but italways
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