Can't Upgrade Because setup & Intallshield Error wont go away.

[Islandstars]

hi,

I keep getting the same error every time i try to upgrade. I purchased the hoster version just before the last 2 upgrades preeceedingthe introduction of 3.0 . ther error that comes up hasthe following information in the details box.:

Error Code: -5006 : 0x80030005
Error Information:
>Kernel\CABFile.cpp (471)
>SetupDLL\SetupDLL.cpp (1254)
PAPP:Hoster
PVENDOR:Micro Technology Unlimited
(http://forum.mtu.com/index.php)
PGUID:BEC98926-4238-4846-A2E3-56A96B217BDD
$7.1.100.1248
@Windows XP Service Pack 2 (2600) IE 6.0.2900.2180chemas-microsoft-com:office:office" />


can somebody help me???????