Multiple pre-rolls do not schedule properly

[paul]

The following config does not seem to playback properly:

{
"ads": {
"servers": [
{
"type": "OpenX",
"apiAddress": " http://openx.openvideoads.org/openx/www/delivery/fc.php",
"allowAdRepetition": true
}
],
"displayCompanions": true,
"companions": [
{ "id":"companion", "width":"150", "height":"360" }
],
"schedule": [
{
"zone": "4",
"position": "mid-roll",
"startTime": "00:00:10",
},
{
"zone": "4",
"position": "mid-roll",
"startTime": "00:00:25",
},
{
"zone": "4",
"position": "mid-roll",
"startTime": "00:00:45",
}
]
},

"debug": {
"debugger": "firebug",
"levels":"fatal, config, vast_template, segment_formation"
}
}

Reported by MTS in the forum:

 http://www.longtailvideo.com/support/forums/open-video-ads/ova-for-jw-player/15272/black-screen-after-the-mid-roll-ad