Unhappy [Q] can't update my htc titan

Hey all,
i'm new and i'm from holland so my english is not perfect, i'm sorry..

I have a problem with my htc titan.. its a windows phone. mango.
I tried everything an search for a solution on google.. nothing works.

On zune i'm getting the error 80180048.
I tried the seveneighter but still an error..

it's really working on my nerves now.. I am not able to open every website becouse it says : you're browser is too old..
I can't download all apps i want, becouse i have to update.

Can anyone help me?