collumn error when exporting to Excel

Dear all,

I am attempting to export my results (data.frame) created with the help of a number of you to Excel.
In the procedure my column structure is however lost and all results are placed together into the first Excel column.
I have tried: write(), write.table(), write.matrix(), export() and have the same results. I Have checked the import/export FAQ and did a Google search to no avail.
Any advice would be greatly appreciated.

Kind greetings,
Daniel

dput(Bolivia.selected.ms.lat.m[1:10,])

structure(list(age = c(0, 0.0833333333333333, 0.166666666666667,
0.25, 0.333333333333333, 0.416666666666667, 0.5, 0.583333333333333,
0.666666666666667, 0.75), country = structure(c(1L, 1L, 1L, 1L,
1L, 1L, 1L, 1L, 1L, 1L), .Label = c("Bolivia", "Brazil", "Colombia",
"Dominican Rep.", "El Salvador", "Guatemala", "Guyana", "Haiti",
"Honduras", "Nicaragua", "Paraguay", "Peru", "Suriname"), class = "factor"),
? ?mu = c(11.4216795790532, 11.336249852927, 11.2841715916567,
? ?11.2112464680493, 11.1163747056146, 11.0042010015542, 10.8814601111044,
? ?10.7555483953614, 10.6326412246687, 10.5168465177670), sigma = c(0.101487190832973,
? ?0.105383747354763, 0.107059434066487, 0.108387198864101,
? ?0.109530496229634, 0.110541869698550, 0.111444696116090,
? ?0.112248590819971, 0.112951348056450, 0.113550216614654)), .Names = c("age",
"country", "mu", "sigma"), row.names = c("1", "2", "3", "4",
"5", "6", "7", "8", "9", "10"), class = "data.frame")

write.matrix(Bolivia.selected.ms.lat.m, file="C:\\Documents and Settings\\Dohyedan\\My Documents\\bolivia.selected.ms.lat.m", sep=" ")

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