"Create correlation" option is disabled for Microsoft .NET scripts
Sometimes the “Create Correlation” option will be disabled for MS .NET scripts as shown below
This is a known problem for Vugen up to LoadRunner 11 Patch 3 version and is going to be fixed for future versions.
To fix this issue follow the below steps
1) Manually select the value to be correlated by clicking on it.
2) Use the right-click key from your keyboard, located at the right of the space bar.