Beta 6 problem with installation media cd 3 and 4 in VMware

Hi, i tried to install the Beta 6 in VMware 4.5.2. I used the full isos for x86. I checked the md5sums and they are correct. Everything went fine except of CD 3 and 4. Yast can't mount them. I only get a media error. If I skip CD 3 and 4 the installation goes on with CD 5. Is this a problem with the installer or with VMware? uli