Maximum allowed budget

What is the maximum allowed budget?

[epcr]

Usually when i have completed my campaigns and added a lot of keywords with a competitive CPC i ask adwords to suggest a budget.

This is always an huge budget since i use many keywords and cost per click is over $1.

I have found that if i use this huge budget my ads get stopped very soon sayng the maximum budget is reached.

Of course it is not true and this happens even if i set the budget to 50k/day or over.

May there is an internal stop over certain budgets or a revisor set the stop waiting for a verification (no email though, and i can't wait(!) )

Anyone have an idea why this happens?
Any clue?

[freeflight2]

with this kind of $$$ you really should have an account manager helping you day & night.

[epcr]

Instead revisors or maybe a system block, marks my account as it was gone out of daily budget even if i have spent only 3-5 dollars.

They don't let me spend money (!)

I whish i could figure out why and why i receive no emails or messages from adword explaining the reason (just a false "daily budget reached and exceeded" message on the diagnostic tool).

thanks for any suggestions or explanation.