I am unable to set a breakpoint in IDA 6. I have tried pressing F2 , but it did not work. Also, the breakpoints buttons on the toolbar are all disabled. What's the problem?
Not all views of IDA offer breakpoints. You should be able to set breakpoints on certain views, for example
IDA View. Other views do not offer breakpoints and automatically disable them. Such views include, but not limited to
This is how the process of setting breakpoints is described in IDA-Pro Book:
Breakpoints are set in IDA by navigating to the location at which you want execution to pause and using the F2 hotkey (or right-clicking and selecting Add Breakpoint). Addresses at which breakpoints have been set are highlighted with a red (by default) band across the entire disassembly line. A breakpoint may be removed by pressing F2 a second time to toggle the breakpoint off. A complete list of breakpoints currently set within a program may be viewed via Debugger->Breakpoints->Breakpoint List.