member is registered but can't post

i have a member who apparently can and says he is logged in but can't post. he keeps recieving this message..

When I try to post, a sentence appears and says my user name is somebody else's? 
I don't know why, or how to fix it. Thanks.


i checked members list and there is only one member with this user name, and it belongs to his email


thanks in advance
rich

Try this:

Administration Panel => General => Forum => Security => Unauthorize subscriptions made with the most commonly used spam usernames. : No

And view the other security options there.

Ramdaman wrote:Try this:

Administration Panel => General => Forum => Security => Unauthorize subscriptions made with the most commonly used spam usernames. : No

And view the other security options there.

that block is  checked No

Can I get a link to your forum to test it out?

ok here it is. and check this out. the member through searching the web is also a member on forumotion

http://fordodgetrucksonly.forumotion.com/forum

I placed a topic in the General Off Topic forum, and it allows me to post.

Maybe you have changed the permissions.

Go to the Administration Panel => General => Forum => Categories & Forums => Press the button at the forum where your member cannot post, then check if members can reply to a topic or create a topic.

have not changed permissions this is the only member who has this problem

delete his acct and have him recreate it .. i mean its not like he has posted anything

ok user deleted. lets call this issue solved for now

You should wait and see if it reoccurs before marking it solved.

Ramdaman wrote:You should wait and see if it reoccurs before marking it solved.

ok . but there is something that may be funny about this whole thing. the member in question had joined forumotion at about the same time he was trying to post on my forum. i bring this up because i don't know if he was trying to back door me. his username was "57dodgertwpw"  and he is non existant  on the internet besides here and my forum

Your forum should be safe as long as you don't give him Administration Panel access.

So the member is saying that he/she gets a error message with a different username?

this was his email to me

"When I try to post, a sentence appears and says my user name is somebody else's? "

What is the sentence?

Hello

Could you please post:
- Url of your forum
- Username of the member + url of his profile
- He cannot post on all the forum or just one section. If only one section, thanks for sending the link of the section? 
- Give a screenshot of the sentence when the user tries to post

Thanks in advance