Running Emulator Error...!!

hi all
sometimes when I wana start an emulator , this error massage display and then my Emulator start with no problem
Error:
"createRenderThread failed to connect"

after it , if I want to run a program, B4A cannot run program and this error happen :

---------------------------------------------
Installing file to device. Error
ADB server didn't ACK
* failed to start daemon *
error: cannot connect to daemon

Restarting ADB Server may solve this problem.
Tools - Restart ADB Server.
-----------------------------------------------

I should restart my computer to solve it... ,
why this error happen and how can I fix it..? thanks :sign0085:

Where do you see this message? Inside the IDE?

when AVD want to start an Emulator I see this:
"createRenderThread failed to connect"

and when I want to run my program by clicking on play in IDE after compiling I see this:
---------------------------------------------
Installing file to device. Error
ADB server didn't ACK
* failed to start daemon *
error: cannot connect to daemon

Restarting ADB Server may solve this problem.
Tools - Restart ADB Server.
-----------------------------------------------

but the Emulator is already run ...!!! it seems som communication error between them

Did you try to delete this emulator and create a new one?