Connecting then Unable to connect , after donating

[couk]

Hello I need help :(

I was playing no problem whatsoever on the server. Then I donated for s4 gear this morning.

After I donated my realmlist automatically set it's self to "set realmlist smolderforge.dyndns.info" I tried to log in and I couldn't.
After that I set my realmslist to "set realmlist connect.smolderforge.com"

I tried again many times and I keep getting the message Connecing.. for 2-3 seconds and then "Unable to connect".

I have not changed anything from since I played last night.

Please help me resolve this issue and thank you in advance. ;(

P.S I just tried to log in another server and it is the same there.

[Deems]

Are you sure your realmlist file is saved as a .wtf file?

I think the most common mistake people make when they change realmlist is that they save it as "realmlist.wtf.txt" by accident.

[couk]

The file itself is named "realmlist" and when I click properties
WTF File (.wtf)

Now the error changed a little bit when I deleted the things in Cache folder

It says connecting succcess etc. let's me see the realm and when I click on it instant "Disconnected from server"

[Henhouse]

Is the realmlist file in the same folder as Wow.exe? Only in Wrath+ did it get moved out of the main folder and into /Data/.

Be sure Wow.exe has an exception in firewall and is allowed to pass through.