I'm assuming you are using an accumulating timer, which uses two V memory locations for its preset, aka a DOUBLE WORD or DWORD, which in this case is V1400/V1401 (two 16 bit words). The relationals only work with 16 bit values.
You can use the Compare Double (CMPD) box, which will work. Look at the Help for CMPD to understand how to use it along with the specific relational SP bits.