Follow up letter after sending dispute letter and no answer

i need to send out a few follow-up letters to Experian since I have disputed items on m credit report. It has been almost one and a half months and still no answer or reply from them as of yet. I sent the letters certified so I have proof of the date they all arrived there in Allen TX. I know that they should have responded by now according to the FTC and federal requirements.
I wanted to check and see if this letter I have pieced together from various templates found on the web is has complete and accurate information before I send it off Certified Mail again. Please let me know if I forgot somethign or should take anything out. I dont want to jeopardize messing anything up since my diputes are valid claims that should be taken off my report.
Also, if it is on TransUnion or EquiFax reports too, do i have to contact them myself to have the same things removed when Experian finally admits the information I'm disputing is inaccurate on my Experian credit report?
Here's the master follow-up letter I have constructed regarding following-up on already disputed items.
Thanks for any input any of you are willing to give me. Reply and let me know please dears!
Daniel

Credit Report Dispute Follow Up Letter

Today's Date




Credit Bureau Name (Experian, Equifax, Trans Union)
Address 1
City, State, Zip Code


Dear Sir or Madam:

I sent your company a reinvestigation request on (month/day/year) regarding certain inaccurate items on my credit report. A copy of my original request and proof of receipt by your company is enclosed herein as an attachment.

In accordance with the Fair Credit Reporting Act, 15 USC section 1681i, your company is required to complete this reinvestigation within 30 days of receipt of my original request. This 30-day period has now passed, and I have not received any response from your company. I believe that your company has been unable to verify the inaccurate information contained in my report, which is why I have not yet received a response.

Please immediately remove the attached inaccurate items from my credit report. Also, please send a corrected report to me and to anyone else who has requested a copy of my credit file within the last six months.

I am sending a copy of this letter and the enclosed attachments to the Federal Trade Commission.

Sincerely,

Wet Signature Here
(Full Legal Name (typed))


(Full, Legal name)
(Physical Address)
(City, State, Zip Code)
(Home and Work phone number)
(Social Security Number)

Encl: Original request and proof of delivery via USPS
cc: Federal Trade Commission