ERROR: Couldn't find world 'rpgmap5_worldsave_.cs'
Shouldn't really matter from what I recall because you haven't hosted before so there hasn't been a world save. When the console came up did it keep crashing or you just can't see it? I know this might not sound logical but sometimes if you host a dedicated server and one IP from your ISP is currently(ie you recently got a new IP) and the other IP not currently(Your IP hasn't refreshed in a long time) it can prevent you from seeing your own server(btw does anyone know why that happens?) so maybe that is your problem.
Another thing to check is your preferences, like whether you have the host public enabled/disabled.
Oh quick little pointer that I wish I remembered when I started up my server. Make sure you rename the script.vol in the Tribes\base folder to script.bak because it will override some of the cs files in the RPG folder. If you do change the name of the script.vol to revert the effects just rename it back.