Hello I'm sorry for the late respond but I'm so thankful for your kind help and answer. Thankyou!
Your DL1-DL3 's one level has 99% data ,so DL1-DL3 don't have any variance to explain Y .
My suggestion is deleting these DL1-DL3 on account of they are not right variable(no power) to predict Y .
Maybe @Rick_SAS @StatDave could give us some better advice .
Hi, I'm sorry for the late respond. It's ok i'm done with the anaysis. Thank you so much for your kind help and attention:)
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