Hmm, I changed the profile for World of Warcraft to launch the 64 bit client "wow-64.exe" and all 5 loaded up perfectly. I should mention too that it used to take me a few mins to launch my team previously, but this time it happened almost right away.

Code:
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| 12:21:48 ISBoxer: Preparing to launch Character Set 'Leveling 2nd Team'
| 12:21:48 ISBoxer: Settings imported from ISBoxerToolkit.GeneralSettings.XML
| 12:21:48 ISBoxer: Making sure Characters in Character Set 'Leveling 2nd Team' are valid...
| 12:21:48 ISBoxer: Good!
| 12:21:48 ISBoxer: Launching Character Set 'Leveling 2nd Team' all slots...
| 12:21:48 ISBoxer: Launching Slot 1 Character 'Drarkansan-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW.exe"'.
Session launched (is1): "I:/World of Warcraft/WoW-64.exe"
| 12:24:14 ISBoxer: Launching Slot 2 Character 'Drarkanbeef-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW.exe"'.
| 12:27:14 ISBoxer: Character from Set 'Leveling 2nd Team' not fully launched after 3 minutes. Select again to continue launching additional slots.
| 12:27:14 ISBoxer: Instructions completed.
|
\====================================================
 
/====================================================
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| 13:00:56 ISBoxer: Preparing to launch Character Set 'Hyjal Team 2'
| 13:00:56 ISBoxer: Settings imported from ISBoxerToolkit.GeneralSettings.XML
| 13:00:56 ISBoxer: Making sure Characters in Character Set 'Hyjal Team 2' are valid...
| 13:00:56 ISBoxer: Good!
| 13:00:56 ISBoxer: Launching Character Set 'Hyjal Team 2' all slots...
| 13:00:56 ISBoxer: Slot 1 already launched. Updating it to character 'Drarkansan-Hyjal' in Character Set 'Hyjal Team 2'
| 13:00:56 ISBoxer: Launching Slot 2 Character 'Drarkanbeef-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW.exe"'.
| 13:03:57 ISBoxer: Character from Set 'Hyjal Team 2' not fully launched after 3 minutes. Select again to continue launching additional slots.
| 13:03:57 ISBoxer: Instructions completed.
|
\====================================================
 
/====================================================
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| 13:08:01 ISBoxer: Preparing to launch Character Set 'Hyjal Team 2'
| 13:08:02 ISBoxer: Settings imported from ISBoxerToolkit.GeneralSettings.XML
| 13:08:02 ISBoxer: Making sure Characters in Character Set 'Hyjal Team 2' are valid...
| 13:08:02 ISBoxer: Good!
| 13:08:02 ISBoxer: Launching Character Set 'Hyjal Team 2' all slots...
| 13:08:02 ISBoxer: Launching Slot 1 Character 'Drarkansan-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW-64.exe"'.
Session launched (is1): "I:/World of Warcraft/WoW-64.exe"
| 13:09:12 ISBoxer: Launching Slot 2 Character 'Drarkanbeef-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW-64.exe"'.
Session launched (is2): "I:/World of Warcraft/WoW-64.exe"
| 13:09:29 ISBoxer: Launching Slot 3 Character 'Drarkanstorm-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW-64.exe"'.
Session launched (is3): "I:/World of Warcraft/WoW-64.exe"
| 13:09:44 ISBoxer: Launching Slot 4 Character 'Drarkantotem-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW-64.exe"'.
Session launched (is4): "I:/World of Warcraft/WoW-64.exe"
| 13:10:00 ISBoxer: Launching Slot 5 Character 'Drarkansham-Hyjal'
Successfully executed '"I:\World of Warcraft\WoW-64.exe"'.
| 13:10:00 ISBoxer: ... no more Slots to launch
| 13:10:00 ISBoxer: Character Set 'Hyjal Team 2' launched
| 13:10:00 ISBoxer: Instructions completed.
|
\====================================================
Session launched (is5): "I:/World of Warcraft/WoW-64.exe"