OpenVPN doesn’t reserve static IP

I've set up a functioning OpenVPN net (with routing)… everything works but the IP reservation. I've a "special" client certificate associated with a IP reservation on my server. I did all the configs: created the ccd folder with the CN of the client file in it and edited the ipp file. Still, when I try to connect to my VPN, my server always gives different IPs to my client. How is that possible? Thank you very much!

Server Configuration:

# Which local IP address should OpenVPN
# listen on? (optional)
local 192.168.1.2

# Port listening on:
port 1194

# TCP or UDP server?
proto udp

dev tun

# Certs:

ca /etc/openvpn/ca.crt
cert /etc/openvpn/server.crt
key /etc/openvpn/server.key

# Diffie hellman parameters.

dh /etc/openvpn/dh2048.pem

# VPN Subnet:
server 10.2.1.0 255.255.255.0

# Static IPs:
ifconfig-pool-persist ipp.txt

# Client Custom Config Dir:
client-config-dir /etc/openvpn/ccd

# Tunneling traffic through VPN:
push "redirect-gateway"

# Push (Windows-Specific) DNS:
push "dhcp-option DNS 8.8.8.8"

# Clients will be able to contact each other:
client-to-client

# The Server will accept clients with the same certificate:
duplicate-cn

# Pings every 300 seconds and wait 900 seconds for a response (to keep alive the connection):
keepalive 300 900

# Compression:
comp-lzo

# Privilege downgrade: (Linux Specific)
user nobody
group nobody

persist-key
persist-tun

# Quick Log:
status openvpn-status.log

# Logs:
log         openvpn.log
log-append  openvpn.log

# Set the appropriate level of log
# file verbosity.
#
# 0 is silent, except for fatal errors
# 4 is reasonable for general usage
# 5 and 6 can help to debug connection problems
# 9 is extremely verbose
verb 3

# Pushing Routes:

route 10.2.1.0 255.255.255.0
push "route 10.2.2.0 255.255.255.0"

Client Configuration:

# Configuration Type:
client

# Device Type:
dev tun

# Protocol:
proto udp

# VPN Server IP:
remote X 1194

# Keep trying indefinitely to resolve the
# host name of the OpenVPN server.  Very useful
# on machines which are not permanently connected
# to the internet such as laptops.
resolv-retry infinite

# Most clients don't need to bind to
# a specific local port number.
nobind

# Downgrade privileges after initialization (non-Windows only)
user nobody
group nobody

# Try to preserve some state across restarts.
persist-key
persist-tun

# Wireless networks often produce a lot
# of duplicate packets.  Set this flag
# to silence duplicate packet warnings.
mute-replay-warnings

# Certs:
ca ca.crt
cert crt.crt
key key.key

# Verify server certificate by checking
# that the certicate has the nsCertType
# field set to "server". 
ns-cert-type server

# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo

# Set log file verbosity.
verb 3