Always DC, After dc need w8 to in, & sumtimes say tat got ppl login !!

Dear gm,
pls help to fix this system it will dc automatically sometimes, and need to wait about 8minutes abv to in Devilms again. Sometimes, after you dc and you in, there will write this is an id that is already logged in, or the server is under inspection.. i didnt do anything and im new in devilms, how can you treat me like this. Fix it thanks..