can't analyze IdentityFile after -o

[iva-nsfocus-zhupeng]

I tried many commands with various types or differences ,but unfortunately sshfs-win can't analyze IdentityFile after -o , I don't know why ,....... I am sure that the path of IdentityFile exists . It seems that this command can not recognize the private key file path I specified
The commands are as follows.
----------------commands----------
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "IdentityFile=C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "IdentityFile C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o IdentityFile C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o IdentityFile=C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: "-o IdentityFile=C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: "-o IdentityFile C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "IdentityFile C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: "IdentityFile C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "IdentityFile C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "IdentityFile=C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"

sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i=C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "i C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i C:\\Users\\22492\\Documents\\amd99001_siyaowj1\\siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i /C/Users/22492/Documents/amd99001_siyaowj1/siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i /cygdrive/c/Users/22492/Documents/amd99001_siyaowj1/siyao1-dengluamd9900"

sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X: -o "-i /cygdrive/c/Users/22492/Documents/amd99001_siyaowj1/siyao1-dengluamd9900"
sshfs-win svc \sshfs.kr\22492=root@10.211.8.241!22\ X:

dir "C:\Users\22492\Documents\amd99001_siyaowj1\siyao1-dengluamd9900-ajiewei"
----------------commands----------

And winfsp-2.0.23075.msi and sshfs-win-3.5.20357-x64.msi are what i have installed with all entire features of every option on.