President Hamid Karzai threatened Sunday to send troops to Pakistan to fight militants themselves.
Afghans sought help for its $50 billion five-year plan as donors met in Paris June 12.
The EU's Javier Solana heads to Iran this weekend to offer revised US-EU incentives.
Tuesday's deadly US incursion is under investigation, but it points up the contrast between the two nations' approaches to militants along the Afghanistan border.
The US-German relationship is perhaps the clearest example of improving ties since the Iraq war began.
Wednesday, a US airstrike killed 11 Pakistani soldiers near the Afghan border.