Advise Before Making my first Move

Hello,

After reading through the forum for 7 days in hopes of getting a better understanding, with much more to learn, I was wonerding if someone could let me know if I am starting off on the right path. I have several account that I want to dispute, but I understand that I should start out with no more than 4 on the average. Below I will list the accounts and tradline information. Can someone please tell me if the assumed approach is correct from their expertise and experience.

(1) SAMS CLUB/MBGA XXXXXXX
Opened: 7-03
High Balance: $501
Payments: 17
Balance: $0
Credit Limit: $0
Date Verified: 02/2005
Date Closed: 04/2004
Date Paid: 02/2004
Pay Status: Payment After Charge Off
Last Dlq: 08-04
Submitted to Coll: 12/04
Hist: 9919559492111111111111111 (25 months Rev)

*I paid this account, via credit card, before being aware of this forum, unfortuantly. Also it is only showing paid on my Transunion file. Therefore, I was wondering if I am trying to get this account deleted, should I first send a letter to the CA to verify that the tradeline is being reported correctly. And then after my green card comes back, send the same letter to the CRB. Or should I send a letter to the CA stating "Not Mine". Then send the same letter to the CRA onc my green card comes back. I made my payment to the collection agency, nevertheless, the OC name is showing on my credit report.

Also if I have an CA on my credit file, who is representing the OC, should I approach them any differently, meaning when it comes to sending them letters. I have paid the CA & their name is actually showing on my credit file. As with the first senerio listed above, I also paid the CA, nevertheless, the OC name is showing on my credit report. I hope I am not going way off into left field, I am rying to make sure that I understand before starting the process. Thanks alot.