Resolution: The steps to fix are repeated here:
1. Launch Internet Explorer.
2. Click the Tools button, and then click Internet Options.
3. On the Security tab of the Internet Options dialog box, select the Local Intranet zone, and then click Sites.
4. In the Local Intranet dialog box, clear the Automatically Detect Intranet Network check box
Disabling automatic intranet detection in Internet Explorer.
4. Select all other check boxes.
5. Click OK twice.
6. Preview your form.
1. Launch Internet Explorer.
2. Click the Tools button, and then click Internet Options.
3. On the Security tab of the Internet Options dialog box, select the Local Intranet zone, and then click Sites.
4. In the Local Intranet dialog box, clear the Automatically Detect Intranet Network check box
Disabling automatic intranet detection in Internet Explorer.
4. Select all other check boxes.
5. Click OK twice.
6. Preview your form.
Reason for occurrences: Related to security issue. InfoPath is reliant on the security settings of Internet Explorer, and Internet Explorer 8 has tightened the security
