Not displaying and very slow download

Till yesterday, the screen has been displayed. But somehow it has been showing all grey since this morning.
The setting screen is displaying without any problem so I believe some bug is interfere for showing maps.
My Internet connection speed is over 50 MBps for regular Internet use from PC and iPad, however downloading single chart takes over 2 to 3 hours (sometimes over 12 hours).

The charts for this application are most likely scanning, I can see some part of charts is not aligned.

I am not recommend to spend your cash to purchase this application till major bug will be fixed.

Addition(2011-07-15)
Deleted this application and downloaded again from app store. Reinstalled application again. Now it is working without grey screen. However all downloaded sectional charts has been deleted.

オープンブック about AviMapGPS, v1.1