I goggled it and found this : not sure if it will help you .
"Ethminer works just fine as well as Claymore's v1.2. I just set a single 16GB pagefile and tried launching v4.1 and it returned the following error: GPU 0, OpenCL error -4 - cannot create DAG.
@Claymore"
"v3.3 takes may be 10-20 more GPU memory, that's the only difference between previous versions. You even did not mention what cards are used, how much RAM etc.
I'm clueless as to why all versions excluding v1.2 fail to create a big buffer despite the fact that they were previously working prior to updating to v3.3. I did mention that the rig in question is seated with a Hawaii-based GPU, more precisely a reference Sapphire 290x operating on Windows 7 x64, Intel Pentium D w/ 2 x 2GB RAM although only 3.25 GB are usable. I can send you my log along with any other information deem it necessary.
Thanks for the quick reply!
Why only 3.25GB are usable?
3.25 only because of WIN 7
That is true only to Windows 7 32-bit but as I'm using the 64 bit-one, I'm almost certain it's due to my motherboard's chipset."
and this
https://bitcointalk.org/index.php?topic=1433925.5040