Failed to reserve memory

C: (5gb) scan works fine, but when i'm trying to scan disk D: (111gb) the following error occures.

Recuva v062

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System Info: MS Windows XP SP2, AMD Athlon 64 Processor 3500+, 1.0GB RAM, NVIDIA GeForce 7600 GT

[16:54:44] ErrorNo: 8 OtherInfo: Error No:536870920 ErrorInfo:Failed to reserve memory.

[16:54:49] ErrorNo: 8 OtherInfo: Error No:536870920 ErrorInfo:Failed to reserve memory.