just found, that this is maybe a network-problem:
traceroute to autoinstall.plesk.com (69.64.46.31), 30 hops max, 38 byte packets
...
4 PAR-4-pos200.fr.lambdanet.net (82.197.144.22) 10.116 ms 10.077 ms 10.074 ms
5 LON-2-pos100.uk.lambdanet.net (82.197.136.33) 17.325 ms 17.381 ms 17.332 ms
6 ASH-1-pos000.us.lambdanet.net (81.209.156.30) 93.834 ms 93.446 ms 93.526 ms
7 sp0-4-ASBNVAAS.broadwing.com (206.223.115.72) 93.965 ms 93.812 ms 93.942 ms
8 g1-2-0.a1.wash.broadwing.net (216.140.8.77) 94.601 ms 94.537 ms 95.094 ms
9 216.140.8.173 (216.140.8.173) 94.830 ms 94.578 ms 94.710 ms
10 so-5-0-0.c1.nwyk.broadwing.net (216.140.17.118) 99.085 ms 99.113 ms 99.067 ms
11 so-2-0-0.c1.gnwd.broadwing.net (216.140.17.49) 118.122 ms 118.154 ms 118.072 ms
12 so-7-0-0.a1.chcg.broadwing.net (216.140.15.138) 122.140 ms 122.060 ms 121.902 ms
13 67.97.47.230 (67.97.47.230) 142.880 ms 143.061 ms 142.948 ms
14 ix8-stl-dc.swsoft.net (69.64.46.241) 142.840 ms 142.891 ms 142.917 ms
15 * * *
16 * * *
17 * * *
traceroute to autoinstall.plesk.com (69.64.46.31), 30 hops max, 46 byte packets
...
4 gi2-2.duesseldorf1-x.d.net.kamp.net (212.110.97.237) 46.807 ms 46.980 ms 46.829 ms
5 ge-7-0.312.edge1.dus1.de.inetbone.net (213.203.192.85) 47.239 ms 46.996 ms 47.229 ms
6 so-3-3.hsa1.Dusseldorf1.Level3.net (212.162.47.77) 46.310 ms 46.736 ms 46.800 ms
7 so-6-2-0.bbr1.Dusseldorf1.Level3.net (4.68.114.237) 46.538 ms 46.719 ms 46.829 ms
8 ae-0-0.bbr2.Chicago1.Level3.net (64.159.1.34) 148.278 ms 148.727 ms 148.065 ms
9 so-0-0-0.mp2.StLouis1.Level3.net (64.159.0.57) 147.854 ms 148.239 ms so-3-0-0.mp1.StLouis1.Level3.net (64.159.0.49) 153.946 ms
10 ge-10-1.hsa1.StLouis1.Level3.net (64.159.0.70) 147.259 ms ge-7-1.hsa1.StLouis1.Level3.net (64.159.4.134) 147.514 ms 147.818 ms
11 server4you-gw.stl1.us.inetbone.net (63.208.32.162) 148.511 ms 146.940 ms 147.070 ms
12 ix8-stl-dc.swsoft.net (69.64.46.241) 148.060 ms 148.011 ms 147.845 ms
13 autoinstall.plesk.com (69.64.46.31) 147.528 ms 148.738 ms 148.041 ms
i will come back, if it's not
cheers,
cRd