Error HTTP 404 on PWA after 1 month work fine

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Hi everybody
this morning our projects not connected to project server, with this msg:

retry accessing the project server - http://servername/projectserver

but when I run msp on work offline and chek on tool| enterprise| project
server accounts | properties| test connection, this is successfuly connected
to project server,
I can not connect PWA, this msg showed to me on IE with servername and IP
for project server:

The page cannot be found
....
HTTP Error 404 - File or directory not found.
Internet Information Services (IIS)


but I could connect to sharepoint on this PC, (IIS is not problem),
my project server was working fine without any problems, but I didn`t know
what happen for it today?

Anyone help me?
Thanks
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[Bita]

Hi everybody,
I didn`t know what happened on my project server, but I remove it and
install again with existing database, it was repaired and work correctly with
all old setting.
best regards
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