Game is not displaying in Nvidia Geforce Experience

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Guest

Guest
I am playing AC:Black flag with Asus gtx 750 1 gb oc gpu, the problem is that it is too much lagging when I set it to ultra at 1366x768 resolution, when I googled I come to know that my gpu can easily handle this game (checked on -game debate- site) but in actual it cant, then I decide to try optiomal settings through Geforce Experience but game is not displaying in it.

Forgot to mention : my processor is i5 3450, 8gb ddr3 ram , good power supply and up to date drivers (cpu and gpu) win 8.1pro