Hi, a few days ago I had the same 2037 problem and contacted Apple iTunes support (
http://www.apple.com/support/itunes/) to resolve the issue. Within 24 hours they replied and said they were investigating the issue. In the meantime, I tried purchasing apps on the iTunes again and, to my surprise, I was successful—the issue was resolved.
Today, I have received few emails more from iTunes support with the following suggestion (see below). I have not tried it since my account is working again, but for those who are having trouble maybe you can try the steps below as they came from iTunes Support.
Suggestion from received from iTunes support:
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I'll walk you through this process to get you back up and running in no time.
1) Make sure you are using the latest version of iTunes. It can be downloaded free of charge at the Apple website:
http://www.apple.com/itunes/download
2) Open iTunes.
3) From the Store menu, choose Sign In.
4) Enter your account name and password then click Sign In.
5) From the Store menu, choose View My Account.
6) On your Apple Account Information page, click Edit Payment Information.
7) On the Edit Payment Information page, select the None radio button to completely remove all your credit card info.
8) Click Done, and then click Done again.
9) From the Store menu, choose Sign Out and then close iTunes completely.
Once you have removed your credit card info, follow these steps:
1) Visit the My Apple ID website at:
http://appleid.apple.com
2) If the site is not displayed in your preferred language, click the Change Language link in the upper-right corner, type the name of your language in the field that appears, then click the Save button.
3) Click the "Manage your account" link.
4) Type your iTunes Store account name (which is your Apple ID) in the Apple ID field, type your password in the password field, then click the Sign In button.
5) Click "Addresses" in the column on the left. Look at your shipping addresses at the bottom. If you have multiple shipping addresses, remove any out-of-date or duplicate addresses by clicking Delete. Also, make sure the state or province field is filled out correctly for each address. To edit an address, click Edit.
6) Now click "Phone Numbers" on the left. The area codes should be in the area code fields and the phone numbers should be in the phone number fields. If an area code is missing, or if it is in a phone number field, your account information may not save properly.
7) Make any other necessary corrections, then click the Save Changes button.
8) Click Log out in the upper-right corner.
When you make your next iTunes Store purchase, you will be asked to review your billing information. At that point, you can update your information or simply click Done. After that, you should be able to purchase items.
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End of suggestion from received from iTunes support.
