Difference: "Signature has problems" and "Validity of certification is UNKNOWN"

[csotelo8885]

Hi,

Could you please explain me what is the difference between these messages?:

The first message appears in a bank document. The second is a document generated for my own app with a openssl crt certificate (apache), so both can be validated with the "Trust settings".

My questions are, why are they different? because my cert is from a crt file?

Thanks in advance,

Cesar