FTP Secure Connection Error

We had an existing FTP script running on 7.3 without issue. Since upgrading to 7.5, we have been unable to establish a connection.
Using:
FTP 'servername' SECCNN(*SSL)

Result:
Connecting to host mywebsite.com at address 99.999.999.999 using port 21.
220 Microsoft FTP Service
234 AUTH command ok. Expecting TLS Negotiation.
Secure connection error, return code 415.

Obviously I've changed the host and IP.

QSSLPCK is *TLSV1.2
QSSLCSLCTL is*OPSYS, *USRDFN
QSSLCSL is
*AES_128_GCM_SHA256
*AES_256_GCM_SHA384
*CHACHA20_POLY1305_SHA256
*ECDHE_ECDSA_AES_128_GCM_SHA256
*ECDHE_ECDSA_AES_256_GCM_SHA384
*ECDHE_RSA_AES_128_GCM_SHA256
*ECDHE_RSA_AES_256_GCM_SHA384
*ECDHE_ECDSA_CHACHA20_POLY1305_SHA256
*ECDHE_RSA_CHACHA20_POLY1305_SHA256

I can connect using WINSCP using Explicit SSL/TLS.

Any suggestions before opening a ticket with IBM?

Thanks,
Greg
[Logo]<https://www.totalbizfulfillment.com/> Greg Wilburn
Director of IT
301.895.3792 ext. 1231
301.895.3895 direct
gwilburn@xxxxxxxxxxxxxxxxxxxxxxx<mailto:gwilburn@xxxxxxxxxxxxxxxxxxxxxxx>
1 Corporate Dr
Grantsville, MD 21536
www.totalbizfulfillment.com<http://www.totalbizfulfillment.com>