Zombies not loading?

[King of Clubs]

Whenever I press play in the launcher, it opens the bo2 bootstrapper and i hear the zombies music but whenever i try to open the game tab, my screen goes black for a second and then it sends me back to desktop. When i looked at the bootstrapper, all it said was
Loading fastfile code_pre_gfx_zm [STEAM] 1 calls ready, running... [STEAM] running call 1 Loading fastfile patch_zm Loading fastfile en_patch_zm Loading fastfile code_post_gfx_zm Loading fastfile en_code_post_gfx_zm Parsing menu ui/t6/menus/optionscontrols.lua... Parsing menu ui/t6/menus/optionssettings.lua... Parsing menu ui/t6/dvarleftrightselector.lua... Parsing menu ui/t6/menus/safeareamenu.lua... Parsing menu ui_mp/t6/hud/loading.lua... Parsing menu ui_mp/t6/hud/scoreboard.lua... Parsing menu ui_mp/t6/hud/spectateplayercard.lua... Parsing menu ui_mp/t6/hud/class.lua... Parsing menu ui_mp/t6/hud/team_marinesopfor.lua... Parsing menu ui_mp/t6/menus/editgameoptionspopup.lua... Parsing menu ui_mp/t6/zombie/hudcompetitivescoreboardzombie.lua... Unknown command: "resetCustomGametype" bound socket to localhost:4976 LUI: raw file loaded Loading fastfile patch_ui_zm Loading fastfile en_ui_zm Loading fastfile ui_zm Parsing menu ui/t6/mainlobby.lua... Parsing menu ui/t6/partylobby.lua... Parsing menu ui/t6/menus/partyprivacypopup.lua... Parsing menu ui_mp/t6/menus/privategamelobby_project.lua... Parsing menu ui_mp/t6/menus/theaterlobby.lua... Loading fastfile ffotd_tu13_zm_147 Unknown command: "maxNumAvatarOffers" Unknown command: "bbdisable" Unknown command: "bbenable" Unknown command: "bbenable" Unknown command: "bbenable" Unknown command: "bbenable" Unknown command: "bbenable" Loading fastfile common_zm Loading fastfile en_common_zm
Can someone help?

[HannesC]

Type r_fullscreen 0; vid_restart in the bootstrapper window. Also make sure your GPU drivers are updated.