Selection tool blinking (black / white)

hi,

 

this maybe newbie question, can't solved problem.

 

i'm working in project 80 layers 3d (mosty images photoshop, 1 camera, null objects, texts, 1 solid grid effect , sound layer in .wav).

most of layers locked. i'm working on layers in bottom.

 

i try animate position of layer manually selection tool. when pass on image in composition front view or camera view, selection tool (arrow) blinking white , black.

 

if try click , drag image, new "window" pop shows layer itself.

 

and times image dragged creating new keyframe.

 

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when happens try select new layer / or layer / or layer's position line or try click elsewhere. goes well, not. can't figure out what's happening.

 

thanks in advance.

 

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ae cs5.5

project 1920*1080

29.97fps

 

windows 7 pro 64bits last updates

 

i'am running firefox , photoshop @ same time.

 

the probleme not appear during rendering :

use of opengl checked when renderring

multiprocessing enable disable ae due lack of memory (that's outgoing message).

 

computer :

cpu : intel core i7 2600k

mb : asus p8z68-v pro/gen3

gpu : msi - n560gtx-ti twin frozr ii oc - 1024mo gddr5

ram : g.skill f3-12800cl9d-8gbsr1 (4x4gb)

sytem drive ae , photoshop installed in : ssd plextor mp3p

project hdd : seagate - barracuda green lp - 2 (2000 go) - 3.5" - sata 3 - 5900 tours - 64 mo - st32000dl003

cache hdd : seagate -  barracuda green lp - 2 (2000 go) - 3.5" - sata 3 - 5900 tours - 64 mo - st32000dl003

what mouse using? tablet used? windows' tablet support enabled? graphics driver updated?

 

mylenium

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