First you need to check that you have MaxSea NavNet Commander or similar,
since MaxSea is also sold in versions without NavNet support.

It is Commander. I receive radar echo from NavNet, but not the chart.

Second you need to check that your MaxSea dongle was configured for C-Map

Dont know how to check this. Actualy I can read the default C-Map chart
allready installed on PC with MaxSea software, but when I go to Open Chart I
se only 3 default charts: C-Map NT, Mapmedia and Planisphere. Same with
radar turned On or Off.

If the above does not work it might be that your software version in the
Furuno vx2 is not new

Checked, software is the latest one, .08.