HTTP Error 500: Internal Server Error - Blackberry Browser

Can't login to websites from blackberry browser (From blackberry)where Authentication is requried:
eg
www.facebook.com 
http://www.qantas.com.au

It comes with error as below: (We are using Blackberry Enterprise Server for Microsoft Exchange 5.0.3)


Error:
HTTP Error: Internal Server Error

An unexpected condition was encountered which prevented your request from being fulfilled. This could be caused by a problem with the gateway,a problem with the destination server, or a problem with the page itself. Please try loading a different page. Contact your service provider it this problem persists.
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propertyozadminAsked:
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Sekar ChinnakannuStaff EngineerCommented:
Upgrade the BlackBerry Enterprise Server software:

For BlackBerry Enterprise Server 4.1 SP7, perform an upgrade to Maintenance Release (MR) 2.
For BlackBerry Enterprise Server 5.0 SP2 for Microsoft® Exchange, perform an upgrade to MR1
For BlackBerry Enterprise Server 5.0 SP1 for IBM® Lotus® Domino®, perform an update to MR2
For BlackBerry Enterprise Server 5.0 SP1 for Microsoft Exchange, perform an update to MR3
If Access Denied: Insecure SSL Request continues to appear on the BlackBerry smartphone at an attempt to access an HTTPS website, set Allow Untrusted HTTPS Connections to True on the BlackBerry Enterprise Server and restart the BlackBerry MDS Connection Service.

Set Allow Untrusted HTTPS Connections to True on the BlackBerry Enterprise Server by completing the following steps:

From BlackBerry Manager, select the preferred BlackBerry MDS Connection Service.
Click Edit Properties.
In the Properties column, highlight TLS/HTTPS.
Change Allow Untrusted HTTPS Connections to True.
Click Apply.
Click OK.
Restart the BlackBerry MDS Connection Service.
Make sure that Allow HTTPS Redirections is set to Yes with the appropriate Trusted Hosts on the BlackBerry smartphone.

In BlackBerry® Device Software 4.0 to 4.7, complete the following steps:

From the Home screen of the BlackBerry smartphone, click Options > Security Options.
In Security Options, click TLS.
Set Allow HTTPS Redirections: to Yes.
Make sure that the preferred HTTPS website is included in the Trusted Hosts.
Press the Menu key and click Save.
In BlackBerry Device Software 5.0.0, complete the following steps:

From the Home screen of the BlackBerry smartphone, click Options > Security Options.
In Security Options, click Advanced Security Options.
Click TLS.
Set Allow HTTPS Redirections to Yes.
Make sure that the preferred HTTPS website is included in the Trusted Hosts.
Press the Menu key and click Save.

also check http://btsc.webapps.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB22536

http://btsc.webapps.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB25614
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propertyozadminAuthor Commented:
Thank you very much!!!

Setting below fixed my issue

From the Home screen of the BlackBerry smartphone, click Options > Security Options.
In Security Options, click Advanced Security Options.
Click TLS.
Set Allow HTTPS Redirections to Yes.
Make sure that the preferred HTTPS website is included in the Trusted Hosts.
Press the Menu key and click Save.
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