Private key missing while importing certificate from internal CA

certificate expired in IIS My task to renew it

I created CSR using mmc and using IIS /create certificate request for my internal CA They released to me .cer file. but while I import it to mmc/Certificates/Personal/Certificates there is missing privite key.

And because of missing privite key my IIS server not accepting it. While I import cert dissapeares.

I tried to fix using certuitil -repairstore my xxx looking for some Smart Card not helped.

I even tried to create using openssl same issue no private key.

I already made crazy my CA with my unlimited CSR.

Where I'm doing wrong? Why there is missing private key even I do all operation on the same server Issue from my side or CA?

Funny, My CA incorreclty issued certificate. There was missing 3rd level, They was sending me chain cert, not actual cert.

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