Lens blur filter - limit in use?!

I've got a question about lens blur. What I've done is duplicate my background layer, and used the quick selection tool to do some lens blur in my photo to imitate depth of field. I've done 3 different lens blur selections on this same duplicate layer. I wanted to do a fourth (I'm doing this with different amount of blurs, that's why it's not all one selection), but all of a sudden I can't apply lens blur anymore. Is there a limit for how many selections you can have in one photo? I also tried duplicating the duplicate layer, but it still won't let me add it. HELP PLEASE!!

Good day!
Could you please post a screenshot with the Layers Panel visible?
Regards,
Pfaffenbichler

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http://adobe.ly/x3bXus

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Good day!
Could you please post a screenshot with the Layers Panel visible?
Regards,
Pfaffenbichler

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See my reply to this question in your original thread:
http://discussions.apple.com/message.jspa?messageID=11675339#11675339
Please try to keep all your responses in the thread that you started there. It makes it much easier for the folks who are trying to help you, keep track of what has already been suggested. Thank you.

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Thanks for your input guys.
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Thanks for your response. I am using a 1024K tile size and a RAID0 scratch disk. (My understanding was that SSD is not appropriate for scratch.) My previous system does not have the benefit of any optimized disks - in fact, that computer's disk are nearly full, which should slow the performance on the older machine and at least give the illusion of better perfomance on the new one.
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Uh-oh...my usual forum disclaimer is typically worded "seasoned pros." C'est la vie. On the otherhand, being 50+ myself, "old" has taken on an elevated status... so it shows honor, respect....deference. Truly.
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Lens blur filter - limit in use?!

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