This is a long running Joomla issue. There is a section on JED for module management - see here. The solution most people use is the Advanced Module Manager by NoNumber though (JED Link here).
This should fix things up for you!
Question
Creating webpage with joomla 2.5. Here is my webpage: http://tartusvk.eu You see there are custom HTML module "Info" under sliding pictues. When i click on "Eestimaa Spordiliit Jõud meistrivõistlused, Pärnu" full article opens. When full article is open i want to that "info" module would not be displayed.
Thank you