Single mouse click works but double click is not working

This kind of problem occurs almost always, because the 'double-click speed' is set too high in the windows 98/Me/XP mouse properties dialog box. So, try to lowering the double-click speed. Under Windows 9x/Me, click Start -> Settings -> Control Panel. Double-click the Mouse icon, and adjust the Double-click Speed slider under the Buttons tab. With Windows XP, click Start -> Control Panel -> Printers and Other Hardware -> Mouse.