Maybe some screen shots to show some of the settings and outputs. Also download the log file then look for the tests.log and look for the "session" like below and post for the iSCSI sessions so we all can see. I have seen in the past many times before where there is another initiator connected to an iSCSI target. For you to now to have issues with getting into the browser tells me there is something else going on (port, duplicate name, separate network, subet, static route...). if rebooting works then possible cache of the browser - use Firefox possibly.

cat /proc/net/iet/session
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cat: /proc/net/iet/session: No such file or directory

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cat /proc/scsi_tgt/iscsi/session
*-----------------------------------------------------------------------------*


Also look in the tests.log and send us the info below.
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ifconfig -a
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