Taskbar disappears on second monitor when i open the game

i use 1400x900 on First Monitor, on second monitor i use 1600x900.

and when i open the game, the taskbar completely disappears, the game itself has a resolution 1024x768, so when i open the game, it automatically changes the resolution of the monitor to first monitor to 1024x768 when im in lobby, and there's no way to change this resolution to another, but IN-GAME inside a room when im playing, i use 1400x900, that's the only resolution that i can change, but i use on recommended of my monitor that is 1400x900.
im having to use a 3rd party dual taskbar program, at least the taskbar dont disappears, it just move a bit sideways but dont disappears.

edit: if you guys wanna know the game is called CROSSFIRE.

Thank you so much, it worked!