Couldn't change active gamemode darkrp

[TakeTor]

Hey guys , can you help me? When i trying to change gamemode (sandbox to darkrp) i have this error : Couldn't change active gamemode darkrp not found.
In folder gamemodes i have gamemode called "darkrp"
In the server.cfg i already wrote : gamemode "darkrp"
My start.bat :
[start /wait/high srcds.exe -console -game garrysmod +maxplayers 30 +map rp_downtown_v2 +fps_max 0 +mp_flashlight 1 -tickrate 66 -port 27015 +sv_lan 0 +gamemode "darkrp"]
Any solutions?

[Sikvibration]

try +exec "server.cfg" instead of gamemode?

[Vomere]

I've had the same problem when I first attempted setting up my own server. here's how I fixed the issue.

@echo off
cd C:\SRCDS\Servers\Garysmod\orangebox
echo Starting game server.
echo Starting Vomere's Server
srcds.exe -console -game garrysmod +gamemode [B][U]postnukerp[/U][/B] +map gm_atomic +maxplayers 24 -tickrate 66
echo Server has now started.

Just changed the [B][U]postnukerp[/U][/B] to [B][U]darkrp[/U][/B] and it should work fine.

Oh and just to clarify the above info is how my server launcher .Bat file was setup.