IE 7 always timeout more likely the slow connection, as workaround needs to increase timeout setting to avoid timeout as below:
When Internet Explorer establishes a persistent HTTP connection with a Web server (by using Connection: Keep-Alive headers), Internet Explorer reuses the same TCP/IP socket that was used to receive the initial request until the socket is idle for one minute. After the connection is idle for one minute, Internet Explorer resets the connection. A new TCP/IP socket is used to receive additional requests. You may want to change the HTTP KeepAliveTimeout value in Internet Explorer.When Internet Explorer establishes a persistent HTTP connection with a Web server (by using Connection: Keep-Alive headers), Internet Explorer reuses the same TCP/IP socket that was used to receive the initial request until the socket is idle for one minute. After the connection is idle for one minute, Internet Explorer resets the connection. A new TCP/IP socket is used to receive additional requests. You may want to change the HTTP KeepAliveTimeout value in Internet Explorer.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\InternetSettings
To do this, follow these steps:
- Click Start, click Run, type regedit, and then click OK.
- Locate and then click the following key in the registry:
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\InternetSettings
- On the Edit menu, point to New, and then click DWORD Value.
- Type KeepAliveTimeout, and then press ENTER.
- On the Edit menu, click Modify.
- Type the appropriate time-out value (in milliseconds), and then click OK. For example, to set the time-out value to two minutes, type 120000.
- Restart Internet Explorer.
If you must have a KeepAliveTimeout value higher than 120000 (two minutes), you must create an additional registry key and set its value equal to the KeepAliveTimeout value that you want. The additional registry key is ServerInfoTimeout.
For example, to use a three-minute KeepAliveTimeout value, you must create the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\InternetSettings KeepAliveTimeout DWORD value 180000 (in milliseconds) ServerInfoTimeout DWORD value 180000 (in milliseconds)