JSON prob in 2.2 URGENT!!

hey guys! Thank you for a speedy response.

when i log into to my admin area, it shows up like normal, but if i make any changes or go to a new area, it logs me out and takes me back to the login screen.

Or i get this error:
Error! The requested URL did not return JSON.

Then there's a check box and to the right of that it says, prevent this page from creating additional dialogs.

i certainly hope someone can help me on this, and quickly.

thank you in advance!! I may even consider paying someone to help me resolve this!

p.s. i tried this fix: uninstall and reinstall PromotionFeed.Froogle plugin but nothing.
and i saw this fix but can't find the code with the new (vs the 2.0 that this was written about) framework.

this one here:


<rule name="AddTrailingSlashRule1" stopProcessing="true">
                    <match url="(.*[^/])$" />
                    <conditions>
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                    </conditions>
                    <action type="Redirect" url="{R:1}/" />
                </rule>



was causing this AJAX call:
POST /Admin/Product/ProductList?products-grid-size=15

to be 301 re-directed to:
/Admin/Product/ProductList/?products-grid-size=15

okay- i think i've resolved it. i don't seem to be kicked out after i do things.
but it's only been ten minutes so - i'll repost if indeed the problem returns. okay?
Good luck! And thanks for reading!

I hit this link:
https://www.nopcommerce.com/boards/t/13269/i-cannot-stay-adminintration-page-ver22.aspx?p=2


then i went here:
http://aspnetresources.com/tools/machineKey

and i inserted it withing the system.web and /system.web section. see post below....  (note: i didn't include the entire element bc i wanted to simply show you where to place it.

  <system.web>
  <machineKey validationKey="D47D012755487665413C4D5E10FB20AC87C462E5A48B64F39A4B917FA123B3124A9D551B6D82
5D1820D73496B7E3E32D64FE0BB9F45F7447E728E350E701B32D" decryptionKey="CFF09FC9385CB916B6C214917D8B2D8A5974C7F81519D4A969E149374301246A"
validation="SHA1" decryption="AES" />
    <!-- TODO Update your <browserCaps> section in order to prevent adding of guest records for
each request made by search engine (although they're periodically deleted) -->
    <!-- Find more info in browserCaps.config file -->
  <browserCaps configSource="browserCaps.config"/>
    <customErrors defaultRedirect="errorpage.htm" mode="RemoteOnly">
      <error statusCode="404" redirect="filenotfound.htm" />
    </customErrors>