[R-sig-Geo] coordinates in Albers Equal Area Conic projection

[Swagath]

Not an expert in reading or interpreting map-projections. I have data 
set with the following description.

     The coordinates are in Albers Equal Area Conic projection, with the 
following projection settings: Scale = 1; False Easting(m) = 5000000; 
False Northing(m) = 0; Longitude Origin = 20; Latitude Origin = 0; 
Standard Parallel 1 = 45; Standard Parallel 2 = 55, and the Ellipsoid is 
WGS 84.

I tired to set the right coordinate system:

proj4string(df) = CRS("+proj=aea 
+lon_0=20+lat_0=0+lat_1=45+lat_2=55+x_0=5000000+y_0=0+ellps=wgs84+units=m")

I appreciate suggestions on what I might be missing.

Thanks, Navin