[Users] unable to login to an iscsi

hello i'm evaluating ovirt and i just setup a datacenter with iscsi as storage i've added my host (centos 6.4) and now i do discovery on my iscsi host. i see several targets but when i click login all the button get's grayed out and nothing seems to be happening thereafter. the lun/target tabs also stays empty i can't seem to see what is going on the only traces that i find are in /var/log/messages : Oct 28 16:02:17 host kernel: scsi: host 0 channel 3 id 0 lun4194304 has a LUN larger than allowed by the host adapter Oct 28 16:02:18 host kernel: ata1.00: hard resetting link Oct 28 16:02:18 host kernel: ata1.01: hard resetting link Oct 28 16:02:18 host kernel: ata1.00: SATA link up 1.5 Gbps (SStatus 113 SControl 300) Oct 28 16:02:18 host kernel: ata1.01: SATA link down (SStatus 4 SControl 300) Oct 28 16:02:18 host kernel: ata1.00: configured for UDMA/100 Oct 28 16:02:18 host kernel: ata1: EH complete Oct 28 16:02:19 host kernel: ata2.00: hard resetting link Oct 28 16:02:19 host kernel: ata2.01: hard resetting link Oct 28 16:02:19 host kernel: ata2.00: SATA link down (SStatus 4 SControl 300) Oct 28 16:02:19 host kernel: ata2.01: SATA link down (SStatus 4 SControl 300) Oct 28 16:02:19 host kernel: ata2: EH complete Oct 28 16:02:22 host kernel: device-mapper: table: 253:3: multipath: error getting device Oct 28 16:02:22 host kernel: device-mapper: ioctl: error adding target to table Oct 28 16:02:22 host kernel: device-mapper: table: 253:3: multipath: error getting device Oct 28 16:02:22 host kernel: device-mapper: ioctl: error adding target to table