When a company files for bankcrupty, the administrators attempt to pay off debts owed to various creditors, by selling off various company assets, making people redundant, reducing costs, and if possible sell more product.
When AE filed for Chapter 11 they still owed vast amounts for the development costs AND the running costs up to July '04 and had lost their financial backers, who were also supporting GN who would have signed a contract to run the EU servers expecting to make a profit, but they TOO were making heavy losses. I suspect that when AE became Tulga many creditors were left empty handed, and p**sed, including the service providers GN were paying money to. The money GN were expecting never arrived, leaving THEM to foot the bill.
Ever since the merge of the EU servers into Unity, GN has quite possibly continued to lose money, especially after many players starting quitting when WoW and EQ2 were released. So Gn has a loss maker on it's hand, no financial support from Tulga, so they reduce their costs to the bare minimum, meaing next to no support whilst talks between the two parties continues.
I would bet that Tulga cannot afford to support GN, nor have the spare cash to buy the intellectual property from them, or that GN is asking too much, maybe hoping to recupe some of it's losses.
So Tulga say nothing, GN say nothing, and Unity slowly dies.