After installing amp file ,when I restarted my server then it says Authentication failed.
Sorry guys ,now i have done that.
I'm glad you were able to help yourself, because I had a lot of questions based on there being so little info in your original question.
Maybe you could post what the problem was and how you solved it so that if someone else does the same thing, they'll benefit from your experience.
The problem was I have installed an amp file but after installing it ,I am not able to login b/c it changes my alfresco.war and share.war file.
so I had found that there was changes in my log files .So After lots of seaching I came into result..
->first of all put all log files to inside the logs folder,then put Original log4j.properties file content from alfresco.war file to extensions where customlog4j.properties.sample file present and modify customlog4j.properties.sample to customlog4j.properties file.
->modify the path only log4j.appender.File.File=/Home/alfresco-4.2.f/tomcat/logs/alfresco.log ,it depends on your needs.
->same changes for share.log ,and File appender definition is not there for share.log so copy all above and modify only log4j.appender.File.File
for share.log file.
->and put solr.log file in /home/rajeev/alfresco-4.2.f/tomcat/conf/Catalina/localhost ,in this path.
If everything is fine then you can restart the server and you got new functionality for your alfresco version -4.2.f.
Retrieving data ...