First things first, CS5 needs to be patched. Help > Updates.
I don't remember the last patch number. Might have been 7.0.3 or 7.0.4.
I tried, but it's no use. Please advise if there are any other solution.
Tried what? Did you update InDesign?
And what version are you at now? 7.03?
Have you tried trashing your preferences?