OWB and Repository Browser

When I using OWBs design Center and I click on Repository Browser and the following URL I get the result "cannot find server" in IE and in Firefox I get "Firefox can't establish a connection to the server at tuscwi-d8jmxq91:8999". Does anybody know what this means?
Regards

Here are some options that you can try
+Increase the Java heap memory
1. Edit the owb.conf file located in the ORACLE_HOME/owb/bin directory.
2. Modify the value in the line "AddVMOption -Xmx768M" to increase the Heap Memory for Java, based on your physical memory.
3. Restart the Design Center and re-try the MDL import.
You can set higher value like 1024, the maximum value that you can set depends on your RAM memory, It should be less than your RAM memory
+Optimize Repository
In the Design center Go to 'Tool' menu and select 'Optiize Repository'
+If the issue is with underlying network or with the databse you may need check with your respective Admins
+For the control center performance issue you can consider applying the cumulative patch 10270220, but i suggest to check with Oracle support before 
applying the patch
Regards,
Pnreddy

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